Retention device for male and female components in excavator machines

Abstract

A retaining device, a retaining system between a female part and a male part, and a female part and male part to assure retention between a wear element or tooth and an adaptor element or tooth bar used in excavators and the like. The female part, which can be a wear element or tooth, or an adaptor element or tooth bar, has, auto-fixed thereto, a retaining device which participates in the coupling with a pin of the female part with a male part, and prevents the pin from coming out of its blocking position, maintaining the fixing between the two parts, i.e., male part and female part. The coupling between both parts is detachable, allows removing the pin from the coupling and replacing the female part or male part together with the retaining device. The retaining device is formed by one or more attached tightening elements.

The invention claimed is: 
     
       1. A female part of the type used in excavators, comprising an internal cavity and with at least two opposite walls, each with an outer surface and an inner surface coinciding with the cavity and at least one of said walls having a through orifice, and a retaining device formed by at least one tightening element, wherein the retaining device comprises two straight sectors attached to one another at one end of each straight sector by a third sector, having a shape conforming to the cavity so as to directly auto-fix by pressure the two straight sectors against the inner surfaces of the walls, and at least one of said straight sectors interfering with an opening of the orifice. 
     
     
       2. The part according to  claim 1 , wherein at least one inner surface of the wall has a groove to house the retaining device. 
     
     
       3. The part according to  claim 2 , wherein the groove runs along at least the inner surface of a wall. 
     
     
       4. The part according to  claim 3 , wherein the groove runs along the inner surfaces of the least two opposite walls of the cavity and of a bottom of said cavity.